Standards Publication

Selection and Installation Guidelines for Electrical Outlet Boxes

NEMA BI 50036-2025 (Formerly OS 3) | Status: Active | ID: 100109

This publication covers guidelines for the selection and installation of general-purpose and specialty metallic, nonmetallic, and composite outlet boxes, including device boxes, boxes for luminaires or other products, junction boxes, extension rings, covers, and flush-device cover plates. The boxes addressed in these guidelines are intended for use in ordinary, non-hazardous locations. With the exception of masonry boxes and some multi-gang boxes and floor boxes, the boxes addressed in these guidelines are limited to 1,650 cm³ (100 in³) internal volume per gang.
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Published Date: September 4, 2025

Number of pages: 46

Staff Contact: Daniel Abbate

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Keywords

NEMA BI 50036-2025 (FORMERLY OS 3), BI 50036, OS3 OS.3 OS-3 NEMA STANDARD SELECTION AND INSTALLATION GUIDELINES FOR ELECTRICAL OUTLET BOXES OS 3-2016 OS 3, NEMA BI 50036